EV Battery Authentication to Prevent Detachable Pack Theft
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Solution Overview
Problem
Secondary batteries used in electric vehicles, such as electric bicycles and motorcycles, are prone to theft due to lack of effective authentication and can be easily resold, leading to significant losses as they can be detached and reused across different models, making it difficult to track stolen batteries.
Innovation Solution
Implementing a mutual authentication system between the electric vehicle body unit and the secondary battery unit using unique identification information stored in memory portions and transmitted via wireless communication, where successful authentication allows power supply to the motor while failed authentication renders the battery non-functional or displays a theft warning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a secondary battery is used that can be detached from the electric vehicle, then the battery can be easily replaced when charged, but the battery becomes vulnerable to theft and can be easily detached by breakage of the physical key
Solution Approach 1:
The patent replaces the mechanical locking system (physical key and lock) with an electronic authentication system. The authentication portion in the secondary battery unit communicates with the electric vehicle body unit via wireless communication to verify authorization. This substitution eliminates the vulnerability of mechanical keys while maintaining easy battery replacement for authorized users.
Solution Approach 2:
The patent introduces an authentication portion as an intermediary between the secondary battery unit and the electric vehicle body unit. This intermediary component verifies the authorization status before allowing power supply or detachment, acting as a mediator that ensures security while enabling convenient operation for authorized users.
2Reliability
If only a fragile physical key is used to lock the secondary battery, then the battery can be easily detached by breakage of the key, but adding complex authentication systems increases device complexity
Solution Approach 1:
The authentication portion serves multiple functions: it authenticates the battery to the vehicle, prevents theft, and controls power supply authorization. By integrating these functions into a single component, the system achieves high reliability without proportionally increasing complexity. The same authentication mechanism handles both security and operational control.
Solution Approach 2:
The patent combines the authentication function with the power supply control function in the authentication portion. Instead of having separate systems for security and power control, these functions are merged into a single integrated component that manages both authorization and power delivery, reducing overall system complexity.
3Adaptability or versatility
If secondary batteries are compatible across different electric vehicle models, then batteries can be freely hooked up to different models, but stolen batteries can be resold and used on other vehicles without tracking
Solution Approach 1:
The patent implements model-specific authentication data stored in the authentication portion of each battery. While the physical battery design remains compatible across models, the authentication information is tailored to specific vehicle models. This allows universal physical compatibility while maintaining digital security specificity, preventing stolen batteries from being used on different models.
Data Source
AI summary
An electric vehicle and a system that easily recognize theft of a secondary battery of an electric vehicle typified by an electrically assisted bicycle and prevent the theft are provided. To prevent the theft of a secondary battery that can be detached from an electric vehicle typified by an electrically assisted bicycle or an electric motorcycle, mutual authentication between an electric vehicle body unit and a secondary battery unit is performed. The secondary battery unit at least includes a first memory portion storing first identification information, an authentication portion, and a wireless communication portion.